Calculate A+B-C+D
Look at the series (7, 16, 43, B, A, 1096, 3283, 9844, 29527, C, 265723, D, ...), determine the pattern, and find the unknown values (A, B, C and D) and calculate A+B-C+D!Correct answers: 19
The first user who solved this task is Nasrin 24 T.
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Getting a Cake
Little Johnny walked into the kitchen, saw his mother making a cake and announced, "I'll be playing in my room for the next two hours. I sure would like a piece of cake when you're finished."
Later, when his mother brought him a piece of cooled cake, Little Johnny exclaimed, "Golly, it worked!"
Puzzled, his mother asked, "What do you mean?"
Little Johnny replied, "Daddy said that in order to get a piece around here, you have to spend a couple of hours playing first!"